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Sludge dewatering method and special oven thereof

A sludge dewatering and sludge technology, which is applied in the fields of dewatering/drying/concentrating sludge treatment, energy and wastewater treatment, solar thermal power generation, etc. Stable quality, low energy consumption and good drying quality

Inactive Publication Date: 2011-01-26
浙江绿治环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the disadvantages of low weight reduction rate and high treatment cost of the existing sludge treatment technology, and provides a sludge dehydration method and an oven for reducing the water content of sludge from 98% to below 30% at one time at low cost. Sludge with a moisture content below 30% can be provided to cement plants as raw materials and power plants as fuel, realizing the resource utilization of sludge and completely solving the harmless treatment of sludge

Method used

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  • Sludge dewatering method and special oven thereof
  • Sludge dewatering method and special oven thereof
  • Sludge dewatering method and special oven thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0059] The equipment design of present embodiment is dried 15 tons by every day

[0060] High temperature heat pump sludge dryer technical requirements:

[0061] 1) Processing capacity: 15t / d

[0062] 2) Moisture content of feed material ≤70%

[0063] 3) The moisture content of the discharge material is 30% (adjustable)

[0064] 4) Heating equipment: solar energy, high voltage electric field, high temperature air source heat pump.

[0065] The equipment is designed to dry 15 tons per day and work 20 hours a day, so the drying capacity per hour can be calculated as: 0.75 tons.

[0066] The heat consumed by drying mainly meets four parts:

[0067] A. The heat Q of bathing by heating 750kg of sludge to 60-65 degrees 1

[0068] B. The heat Q consumed by the evaporation of sludge water 2

[0069] C. The heat Q taken away during the dehumidification process 3

[0070] D. The heat Q absorbed by the equipment 4 (Conveyor belt, iron frame, etc.; this part has less heat and c...

Embodiment 2

[0073] The equipment design of present embodiment is dried 100 tons by every day.

[0074] High temperature heat pump sludge dryer technical requirements:

[0075] 1) Processing capacity: 100t / d sludge with a moisture content of 85%.

[0076] 2) Moisture content of feed material ≤70%

[0077] 3) The moisture content of the discharge material is 30% (adjustable)

[0078] 4) Heating equipment: high temperature air source heat pump and heat pump dehumidification unit

[0079] The equipment is designed to dry 100 tons per day and work 20 hours a day, so the drying capacity per hour can be calculated as: 5 tons. The selected units are 18 15-horsepower units.

Embodiment 3

[0081] The equipment design of present embodiment is by drying 120 tons every day

[0082] High temperature heat pump sludge dryer technical requirements:

[0083] 1) Processing capacity: 120t / d

[0084] 2) Moisture content of feed material ≤70%

[0085] 3) The moisture content of the discharge material is 30% (adjustable)

[0086] 4) Heating equipment: solar energy, high voltage electric field, high temperature air source heat pump.

[0087] The equipment is designed to dry 120 tons per day and work 20 hours a day, so the drying capacity per hour can be calculated as: 6 tons. The selected units are 22 15-hp units.

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Abstract

The invention discloses a sludge dewatering method and a special oven thereof, and the sludge dewatering method comprises the following process steps: 1) pressure filtration: carrying out the pressure filtration on sludge which is not carried out dewatering treatment and has the water content of above 98% by using a plate-frame machine till the water content is below 70%; 2) crushing: shattering the sludge by using a wet soil crushing machine; and 3) drying by a heat pump: leading the sludge to pass through the heat pump drying device to reduce the water content of the sludge to below 30%. The special oven for the sludge dewatering method comprises a box body, a hot air circulation pipeline, a heat pump heating device and a heat insulation device, the oven is provided with a plurality of layers of conveyor belts from top to bottom, the driving directions of the adjacent layer of the conveyor belts are reverse, and a vertical projection point of a terminal point of each layer of the conveyor belt falls on the lower layer of the conveyor belt. The special oven has the advantages of low energy consumption cost, no environmental pollution and good drying quality.

Description

technical field [0001] The invention relates to sludge treatment technology, in particular to a sludge dewatering method. Background technique [0002] In the traditional treatment method, the sewage treatment plant treats the sludge with a moisture content of 98% to the sludge with a moisture content of 80%, and then treats it after reaching the factory standard stipulated by the state. The treatment methods are as follows: [0003] 1. Landfill. Most of the sludge with a water content of 80% is currently the most commonly used way to landfill, which uses the heat generated by the fermentation of the sludge's own organic matter to evaporate. However, due to the huge land occupation and the difficulty of odor treatment, the efficiency is low. For large cities Said to be difficult to apply. In this process, transportation costs and landfill costs will be incurred. The sum of these two items is about 130 to 160 yuan. Costs are higher in big cities. And in the process of tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14F24J2/00
CPCY02E10/40Y02W10/37
Inventor 曹黎甘永雄
Owner 浙江绿治环保技术有限公司
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